PetSTEP – Pet ramps need to be supported when used in the back seat of a vehicle. Only one corner of a ramp will rest on the back seat causing the ramp to tip. The PetSTEP fixes this problem. One end of the Support Strap connects to the unsupported corner of the ramp while the other end hangs on the frame of the door. Features: – For use with the PetSTEP Folding Ramp ONLY. – Rubber coated steel hook won’t damage your paint. – Adjustable nylon support strap. – Attaches in seconds without tools. – can be used from either side of the vehicle. – Drawstring carry bag included.